1 ! Copyright (C) 2005, 2010 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors assocs sequences kernel combinators
4 classes.algebra byte-arrays make math math.order math.ranges
5 system namespaces locals layouts words alien alien.accessors
6 alien.c-types alien.complex alien.data literals cpu.architecture
7 cpu.ppc.assembler cpu.ppc.assembler.backend
8 compiler.cfg.registers compiler.cfg.instructions
9 compiler.cfg.comparisons compiler.codegen.fixup
10 compiler.cfg.intrinsics compiler.cfg.stack-frame
11 compiler.cfg.build-stack-frame compiler.units compiler.constants
13 QUALIFIED-WITH: alien.c-types c
14 FROM: cpu.ppc.assembler => B ;
15 FROM: layouts => cell ;
19 ! PowerPC register assignments:
20 ! r2-r12: integer vregs
24 ! r16-r29: integer vregs
25 ! r30: integer scratch
29 ! Add some methods to the assembler that are useful to us
30 M: label (B) [ 0 ] 2dip (B) rc-relative-ppc-3 label-fixup ;
31 M: label BC [ 0 BC ] dip rc-relative-ppc-2 label-fixup ;
33 enable-float-intrinsics
36 \ ##integer>float t "frame-required?" set-word-prop
37 \ ##float>integer t "frame-required?" set-word-prop
40 M: ppc machine-registers
42 { int-regs $[ 2 12 [a,b] 16 29 [a,b] append ] }
43 { float-regs $[ 0 29 [a,b] ] }
46 CONSTANT: scratch-reg 30
47 CONSTANT: fp-scratch-reg 30
49 M: ppc %load-immediate ( reg n -- ) swap LOAD ;
51 M: ppc %load-reference ( reg obj -- )
52 [ [ 0 swap LOAD32 ] [ rc-absolute-ppc-2/2 rel-literal ] bi* ]
53 [ \ f type-number swap LI ]
56 M: ppc %alien-global ( register symbol dll -- )
57 [ 0 swap LOAD32 ] 2dip rc-absolute-ppc-2/2 rel-dlsym ;
63 : %load-vm-addr ( reg -- ) vm-reg MR ;
65 M: ppc %vm-field ( dst field -- ) [ vm-reg ] dip LWZ ;
67 M: ppc %set-vm-field ( src field -- ) [ vm-reg ] dip STW ;
69 GENERIC: loc-reg ( loc -- reg )
71 M: ds-loc loc-reg drop ds-reg ;
72 M: rs-loc loc-reg drop rs-reg ;
74 : loc>operand ( loc -- reg n )
75 [ loc-reg ] [ n>> cells neg ] bi ; inline
77 M: ppc %peek loc>operand LWZ ;
78 M: ppc %replace loc>operand STW ;
80 :: (%inc) ( n reg -- ) reg reg n cells ADDI ; inline
82 M: ppc %inc-d ( n -- ) ds-reg (%inc) ;
83 M: ppc %inc-r ( n -- ) rs-reg (%inc) ;
85 HOOK: reserved-area-size os ( -- n )
87 ! The start of the stack frame contains the size of this frame
88 ! as well as the currently executing code block
89 : factor-area-size ( -- n ) 2 cells ; foldable
90 : next-save ( n -- i ) cell - ; foldable
91 : xt-save ( n -- i ) 2 cells - ; foldable
93 ! Next, we have the spill area as well as the FFI parameter area.
94 ! It is safe for them to overlap, since basic blocks with FFI calls
95 ! will never spill -- indeed, basic blocks with FFI calls do not
96 ! use vregs at all, and the FFI call is a stack analysis sync point.
97 ! In the future this will change and the stack frame logic will
98 ! need to be untangled somewhat.
100 : param@ ( n -- x ) reserved-area-size + ; inline
102 : param-save-size ( -- n ) 8 cells ; foldable
105 reserved-area-size param-save-size + + ; inline
107 : spill@ ( n -- offset )
108 spill-offset local@ ;
110 ! Some FP intrinsics need a temporary scratch area in the stack
111 ! frame, 8 bytes in size. This is in the param-save area so it
112 ! does not overlap with spill slots.
113 : scratch@ ( n -- offset )
116 ! Finally we have the linkage area
117 HOOK: lr-save os ( -- n )
119 M: ppc stack-frame-size ( stack-frame -- i )
126 M: ppc %call ( word -- ) 0 BL rc-relative-ppc-3 rel-word-pic ;
128 M: ppc %jump ( word -- )
129 0 6 LOAD32 4 rc-absolute-ppc-2/2 rel-here
130 0 B rc-relative-ppc-3 rel-word-pic-tail ;
132 M: ppc %jump-label ( label -- ) B ;
133 M: ppc %return ( -- ) BLR ;
135 M:: ppc %dispatch ( src temp -- )
137 3 cells rc-absolute-ppc-2/2 rel-here
142 M: ppc %slot ( dst obj slot -- ) swapd LWZX ;
143 M: ppc %slot-imm ( dst obj slot tag -- ) slot-offset LWZ ;
144 M: ppc %set-slot ( src obj slot -- ) swapd STWX ;
145 M: ppc %set-slot-imm ( src obj slot tag -- ) slot-offset STW ;
148 M: ppc %add-imm ADDI ;
149 M: ppc %sub swap SUBF ;
150 M: ppc %sub-imm SUBI ;
152 M: ppc %mul-imm MULLI ;
154 M: ppc %and-imm ANDI ;
158 M: ppc %xor-imm XORI ;
160 M: ppc %shl-imm swapd SLWI ;
162 M: ppc %shr-imm swapd SRWI ;
164 M: ppc %sar-imm SRAWI ;
168 :: overflow-template ( label dst src1 src2 cc insn -- )
171 dst src2 src1 insn call
173 { cc-o [ label BO ] }
174 { cc/o [ label BNO ] }
177 M: ppc %fixnum-add ( label dst src1 src2 cc -- )
178 [ ADDO. ] overflow-template ;
180 M: ppc %fixnum-sub ( label dst src1 src2 cc -- )
181 [ SUBFO. ] overflow-template ;
183 M: ppc %fixnum-mul ( label dst src1 src2 cc -- )
184 [ MULLWO. ] overflow-template ;
186 M: ppc %add-float FADD ;
187 M: ppc %sub-float FSUB ;
188 M: ppc %mul-float FMUL ;
189 M: ppc %div-float FDIV ;
191 M:: ppc %integer>float ( dst src -- )
192 HEX: 4330 scratch-reg LIS
193 scratch-reg 1 0 scratch@ STW
195 scratch-reg dup HEX: 8000 XORIS
196 scratch-reg 1 4 scratch@ STW
198 scratch-reg 4503601774854144.0 %load-reference
199 fp-scratch-reg scratch-reg float-offset LFD
200 dst dst fp-scratch-reg FSUB ;
202 M:: ppc %float>integer ( dst src -- )
203 fp-scratch-reg src FCTIWZ
204 fp-scratch-reg 1 0 scratch@ STFD
205 dst 1 4 scratch@ LWZ ;
207 M: ppc %copy ( dst src rep -- )
208 2over eq? [ 3drop ] [
210 { tagged-rep [ MR ] }
212 { double-rep [ FMR ] }
216 GENERIC: float-function-param* ( dst src -- )
218 M: spill-slot float-function-param* [ 1 ] dip n>> spill@ LFD ;
219 M: integer float-function-param* FMR ;
221 : float-function-param ( i src -- )
222 [ float-regs cdecl param-regs nth ] dip float-function-param* ;
224 : float-function-return ( reg -- )
225 float-regs return-reg double-rep %copy ;
227 M:: ppc %unary-float-function ( dst src func -- )
228 0 src float-function-param
230 dst float-function-return ;
232 M:: ppc %binary-float-function ( dst src1 src2 func -- )
233 0 src1 float-function-param
234 1 src2 float-function-param
236 dst float-function-return ;
238 ! Internal format is always double-precision on PowerPC
239 M: ppc %single>double-float double-rep %copy ;
240 M: ppc %double>single-float FRSP ;
242 M: ppc %unbox-alien ( dst src -- )
245 M:: ppc %unbox-any-c-ptr ( dst src -- )
250 0 src \ f type-number CMPI
252 ! Compute tag in dst register
253 dst src tag-mask get ANDI
254 ! Is the object an alien?
255 0 dst alien type-number CMPI
256 ! Add an offset to start of byte array's data
257 dst src byte-array-offset ADDI
259 ! If so, load the offset and add it to the address
260 dst src alien-offset LWZ
264 : alien@ ( n -- n' ) cells alien type-number - ;
266 M:: ppc %box-alien ( dst src temp -- )
269 dst \ f type-number %load-immediate
272 dst 5 cells alien temp %allot
273 temp \ f type-number %load-immediate
274 temp dst 1 alien@ STW
275 temp dst 2 alien@ STW
281 :: %box-displaced-alien/f ( dst displacement base -- )
282 base dst 1 alien@ STW
283 displacement dst 3 alien@ STW
284 displacement dst 4 alien@ STW ;
286 :: %box-displaced-alien/alien ( dst displacement base temp -- )
287 ! Set new alien's base to base.base
288 temp base 1 alien@ LWZ
289 temp dst 1 alien@ STW
291 ! Compute displacement
292 temp base 3 alien@ LWZ
293 temp temp displacement ADD
294 temp dst 3 alien@ STW
297 temp base 4 alien@ LWZ
298 temp temp displacement ADD
299 temp dst 4 alien@ STW ;
301 :: %box-displaced-alien/byte-array ( dst displacement base temp -- )
302 base dst 1 alien@ STW
303 displacement dst 3 alien@ STW
304 temp base byte-array-offset ADDI
305 temp temp displacement ADD
306 temp dst 4 alien@ STW ;
308 :: %box-displaced-alien/dynamic ( dst displacement base temp -- )
310 "not-alien" define-label
313 0 base \ f type-number CMPI
316 ! Yes, it is f. Fill in new object
317 dst displacement base %box-displaced-alien/f
321 "not-f" resolve-label
324 temp base tag-mask get ANDI
327 0 temp alien type-number CMPI
330 dst displacement base temp %box-displaced-alien/alien
335 ! Is base a byte array? It has to be, by now...
336 "not-alien" resolve-label
338 dst displacement base temp %box-displaced-alien/byte-array ;
340 M:: ppc %box-displaced-alien ( dst displacement base temp base-class -- )
345 ! If displacement is zero, return the base
347 0 displacement 0 CMPI
350 ! Displacement is non-zero, we're going to be allocating a new
352 dst 5 cells alien temp %allot
355 temp \ f type-number %load-immediate
356 temp dst 2 alien@ STW
358 dst displacement base temp
360 { [ base-class \ f class<= ] [ 2drop %box-displaced-alien/f ] }
361 { [ base-class \ alien class<= ] [ %box-displaced-alien/alien ] }
362 { [ base-class \ byte-array class<= ] [ %box-displaced-alien/byte-array ] }
363 [ %box-displaced-alien/dynamic ]
369 M:: ppc %load-memory-imm ( dst base offset rep c-type -- )
372 { c:char [ [ dup ] 2dip LBZ dup EXTSB ] }
380 { float-rep [ LFS ] }
381 { double-rep [ LFD ] }
385 M:: ppc %store-memory-imm ( src base offset rep c-type -- )
396 { float-rep [ STFS ] }
397 { double-rep [ STFD ] }
401 : load-zone-ptr ( reg -- )
402 vm-reg "nursery" vm-field-offset ADDI ;
404 : load-allot-ptr ( nursery-ptr allot-ptr -- )
405 [ drop load-zone-ptr ] [ swap 0 LWZ ] 2bi ;
407 :: inc-allot-ptr ( nursery-ptr allot-ptr n -- )
408 scratch-reg allot-ptr n data-alignment get align ADDI
409 scratch-reg nursery-ptr 0 STW ;
411 :: store-header ( dst class -- )
412 class type-number tag-header scratch-reg LI
413 scratch-reg dst 0 STW ;
415 : store-tagged ( dst tag -- )
416 dupd type-number ORI ;
418 M:: ppc %allot ( dst size class nursery-ptr -- )
419 nursery-ptr dst load-allot-ptr
420 nursery-ptr dst size inc-allot-ptr
421 dst class store-header
422 dst class store-tagged ;
424 : load-cards-offset ( dst -- )
425 0 swap LOAD32 rc-absolute-ppc-2/2 rel-cards-offset ;
427 : load-decks-offset ( dst -- )
428 0 swap LOAD32 rc-absolute-ppc-2/2 rel-decks-offset ;
430 :: (%write-barrier) ( temp1 temp2 -- )
431 card-mark scratch-reg LI
434 temp1 temp1 card-bits SRWI
435 temp2 load-cards-offset
436 temp1 scratch-reg temp2 STBX
439 temp1 temp1 deck-bits card-bits - SRWI
440 temp2 load-decks-offset
441 temp1 scratch-reg temp2 STBX ;
443 M:: ppc %write-barrier ( src slot temp1 temp2 -- )
445 temp1 temp2 (%write-barrier) ;
447 M:: ppc %write-barrier-imm ( src slot temp1 temp2 -- )
449 temp1 temp2 (%write-barrier) ;
451 M:: ppc %check-nursery-branch ( label size cc temp1 temp2 -- )
454 temp2 temp2 2 cells LWZ
455 temp1 temp1 size ADDI
459 { cc<= [ label BLE ] }
460 { cc/<= [ label BGT ] }
463 M: ppc %call-gc ( gc-roots -- )
464 3 swap %load-reference
466 "inline_gc" f %alien-invoke ;
468 M: ppc %prologue ( n -- )
469 0 11 LOAD32 rc-absolute-ppc-2/2 rel-this
472 [ [ 1 1 ] dip neg ADDI ]
473 [ [ 11 1 ] dip xt-save STW ]
475 [ [ 11 1 ] dip next-save STW ]
476 [ [ 0 1 ] dip lr-save + STW ]
479 M: ppc %epilogue ( n -- )
480 #! At the end of each word that calls a subroutine, we store
481 #! the previous link register value in r0 by popping it off
482 #! the stack, set the link register to the contents of r0,
483 #! and jump to the link register.
484 [ [ 0 1 ] dip lr-save + LWZ ]
485 [ [ 1 1 ] dip ADDI ] bi
488 :: (%boolean) ( dst temp branch1 branch2 -- )
490 dst \ f type-number %load-immediate
491 "end" get branch1 execute( label -- )
492 branch2 [ "end" get branch2 execute( label -- ) ] when
493 dst \ t %load-reference
494 "end" get resolve-label ; inline
496 :: %boolean ( dst cc temp -- )
497 cc negate-cc order-cc {
498 { cc< [ dst temp \ BLT f (%boolean) ] }
499 { cc<= [ dst temp \ BLE f (%boolean) ] }
500 { cc> [ dst temp \ BGT f (%boolean) ] }
501 { cc>= [ dst temp \ BGE f (%boolean) ] }
502 { cc= [ dst temp \ BEQ f (%boolean) ] }
503 { cc/= [ dst temp \ BNE f (%boolean) ] }
506 : (%compare) ( src1 src2 -- ) [ 0 ] dip CMP ; inline
508 : (%compare-integer-imm) ( src1 src2 -- )
509 [ 0 ] 2dip CMPI ; inline
511 : (%compare-imm) ( src1 src2 -- )
512 [ tag-fixnum ] [ \ f type-number ] if* (%compare-integer-imm) ; inline
514 : (%compare-float-unordered) ( src1 src2 -- )
515 [ 0 ] dip FCMPU ; inline
517 : (%compare-float-ordered) ( src1 src2 -- )
518 [ 0 ] dip FCMPO ; inline
520 :: (%compare-float) ( src1 src2 cc compare -- branch1 branch2 )
522 { cc< [ src1 src2 \ compare execute( a b -- ) \ BLT f ] }
523 { cc<= [ src1 src2 \ compare execute( a b -- ) \ BLT \ BEQ ] }
524 { cc> [ src1 src2 \ compare execute( a b -- ) \ BGT f ] }
525 { cc>= [ src1 src2 \ compare execute( a b -- ) \ BGT \ BEQ ] }
526 { cc= [ src1 src2 \ compare execute( a b -- ) \ BEQ f ] }
527 { cc<> [ src1 src2 \ compare execute( a b -- ) \ BLT \ BGT ] }
528 { cc<>= [ src1 src2 \ compare execute( a b -- ) \ BNO f ] }
529 { cc/< [ src1 src2 \ compare execute( a b -- ) \ BGE f ] }
530 { cc/<= [ src1 src2 \ compare execute( a b -- ) \ BGT \ BO ] }
531 { cc/> [ src1 src2 \ compare execute( a b -- ) \ BLE f ] }
532 { cc/>= [ src1 src2 \ compare execute( a b -- ) \ BLT \ BO ] }
533 { cc/= [ src1 src2 \ compare execute( a b -- ) \ BNE f ] }
534 { cc/<> [ src1 src2 \ compare execute( a b -- ) \ BEQ \ BO ] }
535 { cc/<>= [ src1 src2 \ compare execute( a b -- ) \ BO f ] }
538 M: ppc %compare [ (%compare) ] 2dip %boolean ;
540 M: ppc %compare-imm [ (%compare-imm) ] 2dip %boolean ;
542 M: ppc %compare-integer-imm [ (%compare-integer-imm) ] 2dip %boolean ;
544 M:: ppc %compare-float-ordered ( dst src1 src2 cc temp -- )
545 src1 src2 cc negate-cc \ (%compare-float-ordered) (%compare-float) :> ( branch1 branch2 )
546 dst temp branch1 branch2 (%boolean) ;
548 M:: ppc %compare-float-unordered ( dst src1 src2 cc temp -- )
549 src1 src2 cc negate-cc \ (%compare-float-unordered) (%compare-float) :> ( branch1 branch2 )
550 dst temp branch1 branch2 (%boolean) ;
552 :: %branch ( label cc -- )
554 { cc< [ label BLT ] }
555 { cc<= [ label BLE ] }
556 { cc> [ label BGT ] }
557 { cc>= [ label BGE ] }
558 { cc= [ label BEQ ] }
559 { cc/= [ label BNE ] }
562 M:: ppc %compare-branch ( label src1 src2 cc -- )
566 M:: ppc %compare-imm-branch ( label src1 src2 cc -- )
567 src1 src2 (%compare-imm)
570 M:: ppc %compare-integer-imm-branch ( label src1 src2 cc -- )
571 src1 src2 (%compare-integer-imm)
574 :: (%branch) ( label branch1 branch2 -- )
575 label branch1 execute( label -- )
576 branch2 [ label branch2 execute( label -- ) ] when ; inline
578 M:: ppc %compare-float-ordered-branch ( label src1 src2 cc -- )
579 src1 src2 cc \ (%compare-float-ordered) (%compare-float) :> ( branch1 branch2 )
580 label branch1 branch2 (%branch) ;
582 M:: ppc %compare-float-unordered-branch ( label src1 src2 cc -- )
583 src1 src2 cc \ (%compare-float-unordered) (%compare-float) :> ( branch1 branch2 )
584 label branch1 branch2 (%branch) ;
586 : load-from-frame ( dst n rep -- )
588 { int-rep [ [ 1 ] dip LWZ ] }
589 { float-rep [ [ 1 ] dip LFS ] }
590 { double-rep [ [ 1 ] dip LFD ] }
591 { stack-params [ [ 0 1 ] dip LWZ [ 0 1 ] dip param@ STW ] }
594 : next-param@ ( n -- reg x )
597 : store-to-frame ( src n rep -- )
599 { int-rep [ [ 1 ] dip STW ] }
600 { float-rep [ [ 1 ] dip STFS ] }
601 { double-rep [ [ 1 ] dip STFD ] }
602 { stack-params [ [ [ 0 ] dip next-param@ LWZ 0 1 ] dip STW ] }
605 M: ppc %spill ( src rep dst -- )
606 swap [ n>> spill@ ] dip store-to-frame ;
608 M: ppc %reload ( dst rep src -- )
609 swap [ n>> spill@ ] dip load-from-frame ;
613 M: int-regs return-reg drop 3 ;
615 M: int-regs param-regs 2drop { 3 4 5 6 7 8 9 10 } ;
617 M: float-regs return-reg drop 1 ;
619 M:: ppc %save-param-reg ( stack reg rep -- )
620 reg stack local@ rep store-to-frame ;
622 M:: ppc %load-param-reg ( stack reg rep -- )
623 reg stack local@ rep load-from-frame ;
625 M: ppc %pop-stack ( n -- )
626 [ 3 ] dip <ds-loc> loc>operand LWZ ;
628 M: ppc %push-stack ( -- )
630 int-regs return-reg ds-reg 0 STW ;
632 M: ppc %push-context-stack ( -- )
634 12 11 "datastack" context-field-offset LWZ
636 12 11 "datastack" context-field-offset STW
637 int-regs return-reg 12 0 STW ;
639 M: ppc %pop-context-stack ( -- )
641 12 11 "datastack" context-field-offset LWZ
642 int-regs return-reg 12 0 LWZ
644 12 11 "datastack" context-field-offset STW ;
646 M: ppc %unbox ( n rep func -- )
647 ! Value must be in r3
651 ! Store the return value on the C stack
652 over [ [ reg-class-of return-reg ] keep %save-param-reg ] [ 2drop ] if ;
654 M: ppc %unbox-long-long ( n func -- )
658 ! Store the return value on the C stack
660 [ [ 3 1 ] dip local@ STW ]
661 [ [ 4 1 ] dip cell + local@ STW ] bi
664 M: ppc %unbox-large-struct ( n c-type -- )
665 ! Value must be in r3
666 ! Compute destination address and load struct size
667 [ [ 4 1 ] dip local@ ADDI ] [ heap-size 5 LI ] bi*
670 "to_value_struct" f %alien-invoke ;
672 M:: ppc %box ( n rep func -- )
673 ! If the source is a stack location, load it into freg #0.
674 ! If the source is f, then we assume the value is already in
676 n [ 0 rep reg-class-of cdecl param-reg rep %load-param-reg ] when*
677 rep double-rep? 5 4 ? %load-vm-addr
678 func f %alien-invoke ;
680 M: ppc %box-long-long ( n func -- )
683 [ [ 3 1 ] dip local@ LWZ ]
684 [ [ 4 1 ] dip cell + local@ LWZ ] bi
687 ] dip f %alien-invoke ;
689 : struct-return@ ( n -- n )
690 [ stack-frame get params>> ] unless* local@ ;
692 M: ppc %prepare-box-struct ( -- )
693 #! Compute target address for value struct return
694 3 1 f struct-return@ ADDI
697 M: ppc %box-large-struct ( n c-type -- )
698 ! If n = f, then we're boxing a returned struct
699 ! Compute destination address and load struct size
700 [ [ 3 1 ] dip struct-return@ ADDI ] [ heap-size 4 LI ] bi*
703 "from_value_struct" f %alien-invoke ;
705 M:: ppc %restore-context ( temp1 temp2 -- )
707 ds-reg temp1 "datastack" context-field-offset LWZ
708 rs-reg temp1 "retainstack" context-field-offset LWZ ;
710 M:: ppc %save-context ( temp1 temp2 -- )
712 1 temp1 "callstack-top" context-field-offset STW
713 ds-reg temp1 "datastack" context-field-offset STW
714 rs-reg temp1 "retainstack" context-field-offset STW ;
716 M: ppc %alien-invoke ( symbol dll -- )
717 [ 11 ] 2dip %alien-global 11 MTLR BLRL ;
719 M: ppc %prepare-alien-indirect ( -- )
723 "pinned_alien_offset" f %alien-invoke
726 M: ppc %alien-indirect ( -- )
729 M: ppc immediate-arithmetic? ( n -- ? ) -32768 32767 between? ;
731 M: ppc immediate-bitwise? ( n -- ? ) 0 65535 between? ;
733 M: ppc immediate-store? drop f ;
735 M: ppc struct-return-pointer-type void* ;
737 M: ppc return-struct-in-registers? ( c-type -- ? )
738 c-type return-in-registers?>> ;
740 M: ppc %box-small-struct ( c-type -- )
741 #! Box a <= 16-byte struct returned in r3:r4:r5:r6
744 "from_medium_struct" f %alien-invoke ;
746 : %unbox-struct-1 ( -- )
747 ! Alien must be in r3.
749 "alien_offset" f %alien-invoke
752 : %unbox-struct-2 ( -- )
753 ! Alien must be in r3.
755 "alien_offset" f %alien-invoke
759 : %unbox-struct-4 ( -- )
760 ! Alien must be in r3.
762 "alien_offset" f %alien-invoke
768 M: ppc %begin-callback ( -- )
770 "begin_callback" f %alien-invoke ;
772 M: ppc %alien-callback ( quot -- )
774 3 swap %load-reference
775 4 3 quot-entry-point-offset LWZ
780 M: ppc %end-callback ( -- )
782 "end_callback" f %alien-invoke ;
784 M: ppc %end-callback-value ( ctype -- )
785 ! Save top of data stack
788 ! Restore top of data stack
790 ! Unbox former top of data stack to return registers
793 M: ppc %unbox-small-struct ( size -- )
794 heap-size cell align cell /i {
795 { 1 [ %unbox-struct-1 ] }
796 { 2 [ %unbox-struct-2 ] }
797 { 4 [ %unbox-struct-4 ] }
800 enable-float-functions
805 { [ os macosx? ] [ "cpu.ppc.macosx" require ] }
806 { [ os linux? ] [ "cpu.ppc.linux" require ] }
809 complex-double c-type t >>return-in-registers? drop